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The Smith family has twins, Rob and Rachel. Both Rob and Rachel graduated from college two years ago, and each is now earning $50,000 per year.

The Smith family has twins, Rob and Rachel.  Both Rob and Rachel graduated from college two years ago, and each is now earning $50,000 per year.  Rachel works in the retail industry, where the mean salary for executives with less than 5 years' experience is $35,000 with a standard deviation of $8,000.  Rob is an engineer.  The mean salary for engineers with less than 5 years' experience is $60,000 with a standard deviation of $5,000.
a. Compute the z values for both Rob and Rachel.
b. Comment on your findings

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